$7.5 trillion is indeed a confusing number. Chinese GDP in 2011 was $7.3 trillion so that can't be right either. Can't believe this is printed on Forbes.
edit: it is a blog like article, so much more understandable now.
May be we should back Yuan data, 2011 China GDp 47.16trillion Yuan, 2012 China GDP 51.93 trillion Yuan
GDP by provinces, 1 $=6.2 Yuan now
1, Guangdong 5.706792 trillion yuan
2, Jiangsu 5.405822 trillion yuan
3, Shandong 5.001324 trillion yuan
4 3.46063 trillion yuan, Zhejiang
5, Taiwan NT $ 14,035,036,000,000, equivalent to 2.9951 trillion yuan
6, Henan 2.981014 trillion yuan
7, Hebei 2.657501 trillion yuan
8, Liaoning 2.48013 trillion yuan
9, Sichuan 2.38498 trillion yuan
10 Hubei 2.225016 trillion yuan
11, Hunan 2.215423 trillion yuan
12, 2.010133 trillion yuan in Shanghai
13, Fujian 1.970178 trillion yuan
14, 1.780102 trillion yuan
15, Anhui 1.721205 trillion yuan
16 Hong Kong of 2.0401 trillion Hong Kong dollars, equivalent to 1.6598 trillion yuan
17, Inner Mongolia 1.598834 trillion yuan
18, Shaanxi 1.445118 trillion yuan
19, Heilongjiang 1.369157 trillion yuan
20, Guangxi 1.303104 trillion yuan
21, Jiangxi 1.294848 trillion yuan
22, Tianjin 1.288518 trillion yuan
23, Shanxi 1.211281 trillion yuan
24, Jilin 1.193782 trillion yuan
25, Chongqing 1.1459 trillion yuan
26, Yunnan 1.03098 trillion yuan
27, Xinjiang 746.632 billion yuan
28, Guizhou 680.22 billion yuan
29, Gansu 565.02 billion yuan
30, Hainan 285.526 billion yuan
31 Macau $ 348.2 billion, equivalent to 275.3 billion yuan
32, Ningxia 232.664 billion yuan
33, Qinghai 188.454 billion yuan
34 Tibet 69.558 billion yuan